*{
  margin: 0;
  padding: 0;
  list-style: none;
}
html,body{
  width: 100%;
  height: 100%;
}
.web{
  width: 100%;
  height: 100%;
  .allPage{
    width: 100%;
    height: calc(100% * 4);
  }
  .page{
    width: 100%;
    height: calc(100% / 4);
  }
  .pageOne{
    background: red;
  }
  .pageTwo{
    background: green;
  }
  .pageThree{
    background: blue;
  }
  .pageFour{
    background: yellow;
    overflow: hidden;
    .selectArea{
      margin-top:20px;
    }
    .selectCar{
      margin-top:20px;
    }
  }
}